Cobalt-Chromium Powder Alloys and Retention Coatings Made from Them for Orthopaedic Stomatology

An alloy of Co-Ni-Mo-Cr is prepared by diffusion impregnation with chromium from point sources of cobalt-nickel-molybdenum alloy powder synthesized by combined reduction. Optimum regimes are determined for preparing alloy powder by combined reduction of cobalt, nickel, and molybdenum oxides (reducti...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2005-05, Vol.44 (5-6), p.207-210
Main Authors: Besov, A. V., Maslyuk, V. A., Stepanchuk, A. N., Napara-Volgina, S. G., Orlova, L. N.
Format: Article
Language:English
Subjects:
Alloy powders
Alloys
Chromium
Coatings
Cobalt base alloys
Diffusion
Molybdenum
Reduction
Soaking
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Summary:An alloy of Co-Ni-Mo-Cr is prepared by diffusion impregnation with chromium from point sources of cobalt-nickel-molybdenum alloy powder synthesized by combined reduction. Optimum regimes are determined for preparing alloy powder by combined reduction of cobalt, nickel, and molybdenum oxides (reduction temperature 1325 K, isothermal soaking time 3 h) and diffusion impregnation with chromium (temperature 1373 K, isothermal soaking time 4 h). The adhesive strength of a facing coating with material of a dental prosthesis manufactured using the alloy developed is studied. It is shown that with application of retention layers the adhesive strength increases by a factor of three to five compared with using cast spheres (beads).
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-005-0082-6